/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Dan Halbert for Adafruit Industries
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/microcontroller/Processor.h"

#include <math.h>
#include <stdint.h>

#include "shared-bindings/util.h"

#include "shared/runtime/buffer_helper.h"
#include "shared/runtime/context_manager_helpers.h"
#include "py/mperrno.h"
#include "py/objtype.h"
#include "py/objproperty.h"
#include "py/runtime.h"


//| class Processor:
//|     """Microcontroller CPU information and control
//|
//|     Usage::
//|
//|        import microcontroller
//|        print(microcontroller.cpu.frequency)
//|        print(microcontroller.cpu.temperature)
//|
//|        Note that on chips with more than one cpu (such as the RP2040)
//|        microcontroller.cpu will return the value for CPU 0.
//|        To get values from other CPUs use microcontroller.cpus indexed by
//|        the number of the desired cpu. i.e.
//|
//|        print(microcontroller.cpus[0].temperature)
//|        print(microcontroller.cpus[1].frequency)"""
//|

//|     def __init__(self) -> None:
//|         """You cannot create an instance of `microcontroller.Processor`.
//|         Use `microcontroller.cpu` to access the sole instance available."""
//|         ...

//|     frequency: int
//|     """The CPU operating frequency in Hertz.
//|
//|     **Limitations:** On most boards, ``frequency`` is read-only. Setting
//|     the ``frequency`` is possible on RP2040 boards and some i.MX boards.
//|
//|     .. warning:: Overclocking likely voids your warranties and may reduce
//|       the lifetime of the chip.
//|
//|     .. warning:: Changing the frequency may cause issues with other
//|       subsystems, such as USB, PWM, and PIO. To minimize issues, set the CPU
//|       frequency before initializing other systems.
//|     """

#if CIRCUITPY_SETTABLE_PROCESSOR_FREQUENCY
STATIC mp_obj_t mcu_processor_set_frequency(mp_obj_t self, mp_obj_t freq) {
    uint32_t value_of_freq = (uint32_t)mp_arg_validate_int_min(mp_obj_get_int(freq), 0, MP_QSTR_frequency);
    common_hal_mcu_processor_set_frequency(self, value_of_freq);
    return mp_const_none;
}

MP_DEFINE_CONST_FUN_OBJ_2(mcu_processor_set_frequency_obj, mcu_processor_set_frequency);
#endif


STATIC mp_obj_t mcu_processor_get_frequency(mp_obj_t self) {
    return mp_obj_new_int_from_uint(common_hal_mcu_processor_get_frequency());
}

MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_frequency_obj, mcu_processor_get_frequency);

#if CIRCUITPY_SETTABLE_PROCESSOR_FREQUENCY
MP_PROPERTY_GETSET(mcu_processor_frequency_obj,
    (mp_obj_t)&mcu_processor_get_frequency_obj,
    (mp_obj_t)&mcu_processor_set_frequency_obj);
#else
MP_PROPERTY_GETTER(mcu_processor_frequency_obj,
    (mp_obj_t)&mcu_processor_get_frequency_obj);
#endif

//|     reset_reason: microcontroller.ResetReason
//|     """The reason the microcontroller started up from reset state."""
STATIC mp_obj_t mcu_processor_get_reset_reason(mp_obj_t self) {
    return cp_enum_find(&mcu_reset_reason_type, common_hal_mcu_processor_get_reset_reason());
}

MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_reset_reason_obj, mcu_processor_get_reset_reason);

MP_PROPERTY_GETTER(mcu_processor_reset_reason_obj,
    (mp_obj_t)&mcu_processor_get_reset_reason_obj);

//|     temperature: Optional[float]
//|     """The on-chip temperature, in Celsius, as a float. (read-only)
//|
//|     Is `None` if the temperature is not available.
//|
//|     **Limitations:** Not available on ESP32 or ESP32-S3. On small SAMD21 builds without external flash,
//|     the reported temperature has reduced accuracy and precision, to save code space.
//|     """
STATIC mp_obj_t mcu_processor_get_temperature(mp_obj_t self) {
    float temperature = common_hal_mcu_processor_get_temperature();
    return isnan(temperature) ? mp_const_none : mp_obj_new_float(temperature);
}

MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_temperature_obj, mcu_processor_get_temperature);

MP_PROPERTY_GETTER(mcu_processor_temperature_obj,
    (mp_obj_t)&mcu_processor_get_temperature_obj);

//|     uid: bytearray
//|     """The unique id (aka serial number) of the chip as a `bytearray`. (read-only)"""
STATIC mp_obj_t mcu_processor_get_uid(mp_obj_t self) {
    uint8_t raw_id[COMMON_HAL_MCU_PROCESSOR_UID_LENGTH];
    common_hal_mcu_processor_get_uid(raw_id);
    return mp_obj_new_bytearray(sizeof(raw_id), raw_id);
}

MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_uid_obj, mcu_processor_get_uid);

MP_PROPERTY_GETTER(mcu_processor_uid_obj,
    (mp_obj_t)&mcu_processor_get_uid_obj);

//|     voltage: Optional[float]
//|     """The input voltage to the microcontroller, as a float. (read-only)
//|
//|     Is `None` if the voltage is not available."""
//|
STATIC mp_obj_t mcu_processor_get_voltage(mp_obj_t self) {
    float voltage = common_hal_mcu_processor_get_voltage();
    return isnan(voltage) ? mp_const_none : mp_obj_new_float(voltage);
}

MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_voltage_obj, mcu_processor_get_voltage);

MP_PROPERTY_GETTER(mcu_processor_voltage_obj,
    (mp_obj_t)&mcu_processor_get_voltage_obj);

STATIC const mp_rom_map_elem_t mcu_processor_locals_dict_table[] = {
    { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&mcu_processor_frequency_obj) },
    { MP_ROM_QSTR(MP_QSTR_reset_reason), MP_ROM_PTR(&mcu_processor_reset_reason_obj) },
    { MP_ROM_QSTR(MP_QSTR_temperature), MP_ROM_PTR(&mcu_processor_temperature_obj) },
    { MP_ROM_QSTR(MP_QSTR_uid), MP_ROM_PTR(&mcu_processor_uid_obj) },
    { MP_ROM_QSTR(MP_QSTR_voltage), MP_ROM_PTR(&mcu_processor_voltage_obj) },
};

STATIC MP_DEFINE_CONST_DICT(mcu_processor_locals_dict, mcu_processor_locals_dict_table);

MP_DEFINE_CONST_OBJ_TYPE(
    mcu_processor_type,
    MP_QSTR_Processor,
    MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
    locals_dict, &mcu_processor_locals_dict
    );
